function jumpTous(idSelect1,idSelect2,direc){
	var sel = document.getElementById(idSelect1).value;
	var sel1 = document.getElementById(idSelect2).value;
	
	window.location = direc+"?valor="+sel+"&valor1=-";
}
							
function jumpToisbn(idSelect1,idSelect2,direc){
	var sel = document.getElementById(idSelect1).value;
	var sel1 = document.getElementById(idSelect2).value;
	window.location = direc+"?valor="+sel+"&valor1="+sel1;
}